In 1925, he graduated from Daegu High School, and after passing through the preparatory course at Kyungsung Imperial University, he went on to the Faculty of Law, the University. In 1927, Lee Kang-guk and Choi Yong-dal, the motivations for college admission, joined the school circle 'Economic Research Society' and focused on research on shipbuilding agricultural economics. After graduating from college in 1929 and continuing to study as a teaching assistant, he was examined by the Japanese police in 1931 due to the Seongdae Anti-Revolt Movement incident. He wrote on agricultural topics: He analyzed the land survey business economically describing the late Joseon Dynasty, the feudal society had already seen the bud of the feudal possession of the land as a modern possession, but the modern land ownership system was established in Joseon by the land survey project conducted by the demands of Japanese imperialism. In 1931, he was arrested by the Japanese police after being implicated in the Seongdae Anti-International Movement incident while being an assistant at the Kyungsung Imperial University. Subsequently, in 1944, he participated in the formation of the Korean Restoration Brotherhood under the direction of Lyuh Woon-hyung, a secret association under Japanese imperialism.
Liberation of Korea
Immediately after the liberation of August 15, he was appointed to the permanent committee of the Korea University, but he was transformed into a politician, head of the Planning Committee of the Korea National Preparatory Committee, and the Central People's Committee of Korea. Formed in February 1946, he served as the chief of propaganda and deputy director of the Democratic Front for the Reunification of Korea, as a standing committee member, as a researcher for land agriculture issues, and as a food researcher. On the other hand, in October 1946, the Journal of the Korean Land Issue was published. In this book, the paper on the previous land survey project was published in Japanese during the Japanese occupation period. The National People's Committee in November 1945, prepared reports in which he was involved such as in the "Report on Land Agricultural Problems", the "Code of Conduct for the Farmers' Movement", the “Common Solutions to Land Problems in March”, “Land Policy of the Anti-Democratic Party” in April 1946, and “Democracy and Land Reform” in May of the same year.
